** Tags added: regression-release -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1047531
Title: Ubuntu 12.04 (Precise) guests can't boot on Ubuntu 10.04 (Lucid) QEMU- KVM host Status in “linux” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: For a couple of days I'm trying (on and off) to launch Ubuntu 12.04 guest (32-bit) on my 10.04 KVM host (AMD CPU in 32-bit mode with PAE enabled, stock server kernel). I have tried it with different images (built with VMBuilder, downloaded from cloud-images.ubuntu.com or even the installation ISO images of different flavors). They all hang on boot, either after saying "Starting up ..." or just with a black screen. Kernel options have no effect, it seems the hang happens in GRUB, before kernel is launched. I have tried enabling debug in grub and the last lines I see about loading initrd, malloc and several reallocator.c traces, then hang. A simple steps to reproduce: # wget http://uec-images.ubuntu.com/releases/precise/release-20120822/ubuntu-12.04-server-cloudimg-i386-disk1.img # qemu-img convert -O qcow2 ubuntu-12.04-server-cloudimg-i386-disk1.img moa.qcow2 # kvm -m 512 -smp 1 -drive file=./moa.qcow2 -vnc 127.0.0.1:10 In attached vnc client this briefly displays GRUB prompt and hangs with black screen. The same happens without image conversion step, that is # kvm -m 512 -smp 1 -drive file=./ubuntu-12.04-server-cloudimg-i386-disk1.img -vnc 127.0.0.1:10 At the same time, the host perfectly runs about 10 Lucid guests, so this should not be a host configuration problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1047531/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
